Petersburg, Alaska Climate
United States
Pop. 2,948 Elev. 11 m / 36 ft
TZ: America/Sitka (UTC-8) ·
Petersburg has cool summers with average highs of 67°F (19°C) in August, and frigid winters averaging 18°F (-8°C) in December. Wind chill can push winter lows to 11°F (-12°C). Rain falls on about 146 days per year (111.3 in / 2827 mm total), with snow on 28 days and 158 in (4014 mm) of annual accumulation. The city averages 39 sunny days per year and around 60 thunderstorm days. Ocean water temperatures reach 54°F (12°C) in summer.
| Temperature | 67°F (20°C) high | 18°F (-8°C) low |
| Feels like | 11°F (-12°C) low | |
| Rain | 146 days | 111.3 in (2827 mm) /yr |
| Snow | 28 days | 158.0 in (4014 mm) /yr |
| Sky | 39 sunny | 60 stormy |
| Wind | 3.2 mph (1.4 m/s) avg |
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Explore on the MapMonthly Climate Chart
Best months to visit: Jul, Aug
Sky & Air by Month
Cloud cover (%)
86
Jan 62
Feb 75
Mar 84
Apr 88
May 82
Jun 78
Jul 72
Aug 85
Sep 83
Oct 87
Nov 77
Dec Humidity (%)
82
Jan 74
Feb 76
Mar 77
Apr 81
May 78
Jun 80
Jul 81
Aug 84
Sep 86
Oct 86
Nov 79
Dec Weather Days by Month
Water Temperatures
Cities with Similar Climate
Find similar cities on the map →Nearby Cities
Nearby
Commercial airport 1 mi Petersburg James A Johnson Airport (PSG)
Ski resort 116 mi Eaglecrest Ski Area
National park 15 mi Beecher Pass State Marine Park
Mountain peak
(5,059 ft) 19 mi Fighting John Peak
Hospital 0 mi Petersburg Medical Center
Hiking trail 89 mi Indian River Trail
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Monthly Weather Data
↑ See chart| Month | Avg High | Avg Low | Rainfall | Snowfall | Sunny Days |
|---|---|---|---|---|---|
| January | 39°F 4°C | 32°F 0°C | 7.5 in 190 mm | 42.1 in1070 mm | 2 |
| February | 34°F 1°C | 21°F -6°C | 5.7 in 145 mm | 8.1 in206 mm | 11 |
| March | 44°F 7°C | 34°F 1°C | 4.8 in 122 mm | 25.4 in644 mm | 3 |
| April | 50°F 10°C | 39°F 4°C | 9.3 in 237 mm | 3.7 in94 mm | 0 |
| May | 52°F 11°C | 44°F 7°C | 15.6 in 396 mm | 0.3 in7 mm | 0 |
| June | 60°F 16°C | 50°F 10°C | 6.2 in 156 mm | — | 4 |
| July | 65°F 18°C | 55°F 13°C | 7.7 in 196 mm | — | 2 |
| August | 67°F 20°C | 55°F 13°C | 7.8 in 197 mm | — | 5 |
| September | 60°F 16°C | 50°F 10°C | 17.3 in 439 mm | — | 2 |
| October | 49°F 10°C | 41°F 5°C | 13.9 in 353 mm | 3.3 in83 mm | 4 |
| November | 41°F 5°C | 35°F 2°C | 8.0 in 202 mm | 16.2 in410 mm | 1 |
| December | 27°F -3°C | 18°F -8°C | 7.6 in 192 mm | 59.0 in1499 mm | 5 |
Weather Days by Month
↑ See chart| Month | Sunny Days | Storm Days |
|---|---|---|
| January | 2 | 3 |
| February | 11 | 1 |
| March | 3 | 1 |
| April | 0 | 4 |
| May | 0 | 8 |
| June | 4 | 3 |
| July | 2 | 4 |
| August | 5 | 4 |
| September | 2 | 10 |
| October | 4 | 8 |
| November | 1 | 6 |
| December | 5 | 8 |
Water Temperatures Data
↑ See chart| Month | Ocean Avg High | Lake Avg High |
|---|---|---|
| January | 41°F 5°C | 32°F 0°C |
| February | 39°F 4°C | 32°F 0°C |
| March | 40°F 4°C | 33°F 1°C |
| April | 42°F 6°C | 39°F 4°C |
| May | 46°F 8°C | 44°F 7°C |
| June | 51°F 10°C | 50°F 10°C |
| July | 53°F 12°C | 57°F 14°C |
| August | 54°F 12°C | 62°F 16°C |
| September | 53°F 12°C | 57°F 14°C |
| October | 46°F 8°C | 46°F 8°C |
| November | 44°F 7°C | 38°F 3°C |
| December | 42°F 6°C | 33°F 1°C |